Hylaeamys is a genus of South American oryzomyine rodents found principally in humid forested areas east of the Andes. The species in this genus have historically been placed in Oryzomys. They are most closely related to Euryoryzomys, Transandinomys, Nephelomys, Oecomys, and Handleyomys, and most closely resemble species of the former two genera. They are distinguished from members of Euryoryzomys by all-dark or indistinct two-tone tail coloration (as opposed to the distinct two-tone tail coloration of Euryoryzomys), from members of Transandinomys by having shorter whiskers above their eyes that do not extend posteriorly behind their ears, and in both cases by differences in carotid circulation. The genus is named after hylaea ("forest" in Greek), the term used by Humboldt for the lowland South American rainforests that are the main habitat of the genus.

Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Cricetidae
Subfamily: Sigmodontinae
Tribe: Oryzomyini
Genus: Hylaeamys
Weksler et al., 2006
Type species
Mus megacephalus
Fischer, 1814

Hylaeamys acritus
Hylaeamys laticeps
Hylaeamys megacephalus
Hylaeamys oniscus
Hylaeamys perenensis
Hylaeamys tatei
Hylaeamys yunganus

The genus currently comprises the following species:


  • Weksler, M.; Percequillo, A. R.; Voss, R. S. (2006-10-19). "Ten new genera of oryzomyine rodents (Cricetidae: Sigmodontinae)". American Museum Novitates. New York: American Museum of Natural History. 3537: 1–29. doi:10.1206/0003-0082(2006)3537[1:TNGOOR]2.0.CO;2. hdl:2246/5815. ISSN 0003-0082.